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More Than 100 Cities In The World Achieve 70% Power Supply By Renewable Energy
- Apr 04, 2018 -

       The data released by the Non-Profit Organization Carbon Disclosure Project (CDP) recently revealed that more than 100 cities in the world currently use 70% of renewable energy to supply electricity. Compared to 40 cities in the 2015 list (up to 70% or more), the number has grown by at least twice, and they have great potential for sustainable development. Seattle, USA, Oslo, Norway, Vancouver, Canada, and Nairobi, Kenya all achieved 70% of their electricity supply from renewable energy sources.

       Statistics show that 275 cities use hydropower, and 189 and 184 cities rely on wind and solar power respectively. Reykjavík in Iceland and Burlington in the United States are the most representative. The former is dominated by hydropower and geothermal power, while the latter finds electricity from many sources such as wind power, hydropower, solar energy and biomass energy. In the United States, 58 cities, including Atlanta and San Diego, have planned to transition to 100% clean and renewable energy.

        Not long ago, a study by Finland and Germany also showed that, with the current level of technology, by 2025, it is expected to achieve 100% renewable energy power supply on a global scale, eventually achieving the goal of zero carbon emissions, and the cost will be lower than 2015. The average cost of the year. This study envisages that by 2050, solar power accounts for 57.55%, wind power accounts for 37.14%, hydropower accounts for 4%, wave energy accounts for 0.58%, geothermal energy accounts for 0.67%, and tidal energy accounts for 0.06%.

        In addition, a recent study by the United States University of California, Irvine, California Institute of Technology and Carnegie Institute of Science, the results of a study released recently is encouraging. Solar and wind power can meet 80% of the U.S. electricity demand. The team analyzed the hourly weather data in the United States from 1980 to 2015 to understand the obstacles that rely solely on solar and wind power. They studied the temporal and spatial changes in solar and wind energy and compared it to the U.S. electricity demand. It is concluded that by building a mainland transmission network, 80% of the required electricity can be obtained.

       In the United States, fossil fuel-based electricity production currently accounts for 38% of carbon dioxide emissions, and carbon dioxide is the main cause of global warming. Five years ago, many people believed that wind and solar power alone could only meet 20% to 30% of all electricity demand.

      The joint scientific research team pointed out that increasing transmission or storage capacity means huge investment, and the cost of new transmission lines may be as high as hundreds of billions of dollars. In addition, it is necessary to overcome the energy reserve problems brought about by seasonal and weather changes in order to achieve the ideal standard to meet 80% of the electricity demand. Steven Davies, Associate Professor of Earth System Science at the University of California, Irvine, stated, “If you want a reliable power system based on solar and wind energy, consider how to deal with its daily and seasonal changes. Our work shows that there is still a need for other The low carbon emissions of electricity generation methods, such as nuclear power, etc., will make up for the gap until the final power storage and transmission capacity reaches the desired level."


----Xiamen Lynsa Intelligent Technology Co., Ltd.